Improvement in steam-generators



J. SOHOPIELD & D. D. PRYOR.

Steam-Generators.

N 0. 211,058. Patented Dec. 17, 1878.

' INVENTORS acm f- 8 422237 &4

ATTORN BY Nmarus. PHOTD-LITMOGRAFHEB, WASHINGTON. D. 0,

w va UNITED STATES PATENT Orr'rcn;

JACOB SOHQFIELD AND DAVID D. PRYOR, OF NEWTON, IOWA.

IMPROVEMENT IN STEAM -GENERA TORS.

Specification forming part of Letters Patent No. 211,058, dated December17, 1878 application filed November 2, 1878.

To all whom it may concern:

Be it known that we, J A0013 SoHoFInLn and DAVID D. PRYoR, bothofNewton, in the county ofJasper and State ofIowa, have invented a newand valuable Improvement in Steam-Generators; and we do hereby declarethat the followin g is a full, clear, and exact description of theconstruction and operation of the same, refercal boiler made in twoflanged sections, the

one having a projecting L-shaped recess extending entirely around it,and the other a corresponding recess adapted to form a joint therewith,and its enveloping casing divided by the boiler into the upper and lowerchambers, and having a removable topand a rod for operatingthe same, aswill be hereinafter shown and described.

In the annexed drawings, the letter A designates the boiler of ourimproved steam-generator, formed of two semi-cylindrical sections, ac,having each an L-shaped flange, b. The lower section, a, has upon itsinner edge araised lip, 0, extending completely around it, that isreceived in a corresponding recess, (1, upon the upper section, a, orthe reverse. The cylinder A has the usual feed-water and'steam pipes ee, a safety-valve, f, and water-gages, and is suspended within acylindrical casing of greater diameter. This casing has upon its insidea ledge, g, upon which the flange b of the boiler rests, and has anunbroken end wall, h. It is provided at its front end with a fire-box,0, having the customary grate, doors, and dampers.

The flanges b, and the boiler from which they project, divide the casinginto an upper and lower chamber, lettered, respectively, I I,

that communicate with each other only through the ascending passage inbetween the rear head of the boiler and the end wall, h, of the casing.The lower passage, Z, opens into the furnace G, and the products ofcombustion pass out of the said furnace through the passage t, then upthe flue m into the passage 1, whence they escape into the open airthrough a stack, D, at the front end of the said casing. The boiler isthus completely enveloped in flames, and as the steam rises it issuperheated in the upper portion thereof before passing into thesteaming-vessel through the steam-pipe e. The upper half, a, of thecasing B is separate and distinct from the lower half, a and is providedwith orifices '5, through which eyebolts 2" upon the latter extend.These orifices are made in a flange, p, of the upper section. The partsof the, casing are connected together by means of through-rods A, madein two flanged sections, the one having a projecting L-shaped recessextending entirely around it, and the other a corresponding recessadapted to form a joint therewith, and its enveloping casing B, dividedby the boiler into the upper and lower chambers, 11, andhaviug aremovable top, a, and rod j, substantially as specified.

In testimony that we claim the above we have hereunto subscribedournames in the presence of two witnesses.

JACOB sononrnnn, nnvrn 1). rnvon.

Witnesses:

W. M. PRYOR, JOSEPH Coornn.

